NASA's Europa Clipper spacecraft successfully tested its ice-penetrating radar system during a close flyby of Mars earlier this year.
Sometimes the easiest way to understand the physics of a phenomenon is to make a physical model of it. But how do you make a model of a system as large as, say, a protoplanetary disc? One technique, suggested in a recent paper in the Monthly Notices of the Royal Astronomical Society Letters by researchers at the Max Planck Institute for Astrophysics and the University of Greifswald, would be familiar to any grade schooler who took a science class - spin water around in a circle really fast.
